Function pfmod

source/core/StarMathCommon.hpp:209–214

// Same as pmod but for float like values.
template <typename Float>
Float pfmod(Float a, Float m) {
  if (m == 0)
    return a;

  return a - m * floor(a / m);
}

// Finds the *smallest* distance (in absolute value terms) from b to a (a - b)
// in a non-euclidean wrapping number line.  Suppose size is 100, wrapDiff(10,